Effect of calcination temperature on the characteristics of TiO2 synthesized from ilmenite and its applications for photocatalysis

2nd Mineral Processing and Technology International Conference

工业技术（总论）;矿业工程

Aristanti, Y.^1 ; Supriyatna, Y.I.^2 ; Masduki, N.P.^1 ; Soepriyanto, S.^3

Department of Metallurgical and Material Engineering, Bandung Institute of Technology and Science, Bekasi

17530, Indonesia^1

Reasearch Unit for Mineral Technology, Indonesia Institute of Sciences, Lampung

35361, Indonesia^2

Department of Metallurgical Engineering, Bandung Institute of Technology, Bandung

40132, Indonesia^3

关键词: Acid consumption;    Band gap energy;    Calcination temperature;    Fusion process;    ITS applications;    Leaching process;    Methylene Blue;    Titanium dioxides (TiO2);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/478/1/012019/pdf
DOI  :  10.1088/1757-899X/478/1/012019

学科分类：工业工程学

来源: IOP

【 摘 要 】

Titanium dioxide (TiO2) contained in the Ilmenite Bangka mineral was synthesized by varying the calcination temperature to obtain characteristics that can improve the photocatalic ability. It can be a solution to handling of waste in the textile industry. Synthesis starts from a caustic fusion process using NaOH to decompose of ilmenite into the titanate compound were more soluble in acid, so that can reduce acid consumption in the leaching process. The leaching process uses 8 M H2SO4 in 5% solid to produce TiOSO4 as a filtrate. Then the filtrate was hydrolyzed to obtain the precipitate TiO2-Fe2O3. Calcination with variation of temperature was came after leached the precipitate with the water until neutral pH is obtained. The temperature used is: 350 °C (TiO2 T1), 450 °C (TiO2 T2), 550 °C (TiO2 T3), 650 °C (TiO2 T4), and 750 °C (TiO2 T5). The results of photocatalytic activity test using a solution of Rhodamin B (RhB) and Methylene Blue (MB) revealing that the highest photocatalyst efficiency was achieved by TiO2 which calcined at a temperature of 650 °C, with 69.33% (RhB) and 83.41% (MB).Where in this temperature, rutile phase began to form about 15.38%, the band gap energy on 2.4 eV, and the growth of crystalite size become 53.41 nm which affected the increase in photocatalytic activity.